Protective mask



FIG. 1 is a left side elevational view of a protective mask illustratingthe orientation of the mask when worn by a human being, the outline ofthe human being indicated by the phantom lines and forming no part ofthe invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a protective mask, as shown and described.